<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <style>
    @media screen and (max-width: 539px) {
      body {
        background-color: blue;
      }
    }
    @media screen and (min-width: 540px) and (max-width: 969px) {
      body {
        background-color: green;
      }
    }
    @media screen and (min-width:970px){
      body {
        background-color: red;
      }
    }

  </style>
  <body></body>
</html>
